Bug 1566096

Summary:	SELinux blocking PPPoL2TP: "Given FD for PPPoL2TP socket invalid"
Product:	[Fedora] Fedora	Reporter:	Erik Indresovde <erikindre>
Component:	selinux-policy	Assignee:	Lukas Vrabec <lvrabec>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	28	CC:	dwalsh, lvrabec, mgrepl, plautrba, pmoore, wijngaarde
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	selinux-policy-3.14.1-21.fc28	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	1566271 (view as bug list)		Environment:
Last Closed:	2018-04-19 22:07:35 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Erik Indresovde 2018-04-11 14:11:54 UTC

Installed ppp-2.4.7-21.fc28 after having this problem:
https://bugzilla.redhat.com/show_bug.cgi?id=1564459

This solved original issue, but now SELinux is blocking the connection. Setting SELinux to permissive gets rid of the error and connection can be established. 


april 09 18:46:17 fedora28 pppd[4915]: Plugin pppol2tp.so loaded.
april 09 18:46:17 fedora28 pppd[4915]: Given FD for PPPoL2TP socket invalid (Socket operation on non-socket)
april 09 18:46:17 fedora28 NetworkManager[945]: xl2tpd[4914]: child_handler : pppd exited for call 37794 with code 1
april 09 18:46:17 fedora28 NetworkManager[945]: xl2tpd[4914]: call_close: Call 18324 to 217.170.203.128 disconnected
april 09 18:46:17 fedora28 pppd[4915]: Exit.
april 09 18:46:17 fedora28 NetworkManager[945]: xl2tpd[4914]: get_call: can't find call 18324 in tunnel 28266
april 09 18:46:17 fedora28 NetworkManager[945]:  (ref=0/0)xl2tpd[4914]: get_call: can't find call 18324 in tunnel 28266
april 09 18:46:20 fedora28 NetworkManager[945]:  (ref=0/0)xl2tpd[4914]: get_call: can't find call 18324 in tunnel 28266
april 09 18:46:30 fedora28 NetworkManager[945]:  (ref=0/0)xl2tpd[4914]: death_handler: Fatal signal 15 received
april 09 18:46:30 fedora28 NetworkManager[945]: xl2tpd[4914]: Connection 21741 closed to 217.170.203.128, port 1701 (Server closing)

SEAlert is not giving any notification, but I found the following in ausearch:

type=AVC msg=audit(1523314447.297:358): avc:  denied  { getattr } for  pid=6450 comm="pppd" scontext=system_u:system_r:pppd_t:s0 tcontext=system_u:system_r:l2tpd_t:s0 tclass=pppox_socket permissive=1
type=AVC msg=audit(1523314447.297:359): avc:  denied  { getopt } for  pid=6450 comm="pppd" scontext=system_u:system_r:pppd_t:s0 tcontext=system_u:system_r:l2tpd_t:s0 tclass=pppox_socket permissive=1
type=AVC msg=audit(1523314447.318:360): avc:  denied  { ioctl } for  pid=6450 comm="pppd" path="socket:[77543]" dev="sockfs" ino=77543 ioctlcmd=0x7437 scontext=system_u:system_r:pppd_t:s0 tcontext=system_u:system_r:l2tpd_t:s0 tclass=pppox_socket permissive=1

I made some attempts of adding a local policy, but unable to make it work. Any suggestions on how to add a workaround?

Comment 1 Fedora Update System 2018-04-16 11:35:05 UTC

selinux-policy-3.14.1-21.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-1148ada2a3

Comment 2 Fedora Update System 2018-04-17 03:04:08 UTC

selinux-policy-3.14.1-21.fc28 has been pushed to the Fedora 28 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-1148ada2a3

Comment 3 Erik Indresovde 2018-04-17 23:20:52 UTC

Problem solved with selinux-policy-3.14.1-21.fc28.

Comment 4 Fedora Update System 2018-04-19 22:07:35 UTC

selinux-policy-3.14.1-21.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.